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Suppose that 12 people must travel in 3 cars containing 4 people each from LA to New York. How many different arrangements are there?
Scores on a scholastic aptitude test are normally distributed with standard deviation σ=100 points. A group of 25 inner city high school students takes the test; their mean scores is x-bar = 440 points.
Correlation between the two variables based on scatter plot - Show the scatter plot for the variables.
The number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a standard deviation of 50. What is the probability that a student uses fewer than 600 minutes?
In terms of p , the researcher should test which of the following null and alternative hypotheses?
expectation of the statistic that was proposed by Statistician - Based on the information collected in Tasks 1-8, which of the two statistics produces values which tends to be more concentrated about the expectation of the measurement?
Suppose the sample variance for 3 parts turns out to be S2 = .0005. Use a=.05 to test whether the population variance specification is being violated.
A compute manufacturer is about to unveil a new,faster PC.The new PC is faster but intial tests incidcate there is more variation in the processing time.
What proportion of sample means would be between 1.31 and 1.33 inches?
What do confidence intervals represent? What is the most controllable method of increasing the precision of or narrowing the confidence interval? What percentage of times will the mean, or population proportion, not be found within the confidence ..
Evaluate the area under the standard normal curve that lies to the left of z = - 3.49 and simple random sample of size
Choose the correct answer using sum of squared error (SSE).
What value is business research and hypothesis testing to a company? What is the "perfect" standard normal distribution? Explain your answer.
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